Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 8 - Applications of Trigonometric Functions - 8.4 Area of a Triangle - 8.4 Assess Your Understanding - Page 544: 15


$3.86$ square units

Work Step by Step

By definition: $K=\frac{ab\cdot \sin(C)}{2}.$ Hence, here $K=\frac{3\cdot4\cdot \sin(40^o)}{2}\approx3.86.$
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